associated to the power-law inflation where the scale factor of the universe evolves as \(a(t)\propto t^{q}\) , \(q>1\)  [1]}, [2]}, [3]}. This class of inflationary models is usually ruled out by the Planck data [4]}. Here \(k\)  has the dimension \([mass]^{-1}\)  and \(V_{0}\)  refers to the energy scale with the dimension of \([mass]^{4}\) .
